The coast Douglas-fir variety is the dominant tree west of the Cascade Mountains in the Pacific Northwest. It occurs in nearly all forest types and competes well on most parent materials, aspects, and slopes. Adapted to a more moist, mild climate than the interior subspecies, it grows larger and faster than Rocky Mountain Douglas-fir.

2023年9月28日 · Douglas fir, scientifically known as Pseudotsuga menziesii, is a popular evergreen tree native to western North America. From Central British Columbia on Vancouver Island, throughout the Rocky Mountains to central California, Arizona and Mexico, this coniferous tree thrives in various climates.

Douglas firs are evergreen trees, meaning they keep their needle-like leaves year-round. There are two varieties of this species, coast Douglas fir and Rocky Mountain Douglas fir, which are differentiated by their habitats, growth rates, and physical characteristics.

2025年1月20日 · Douglas fir, (genus Pseudotsuga), genus of about six species of evergreen trees of the conifer family Pinaceae, native to western North America and eastern Asia. The trees are important timber trees, and the strong wood is used in boats, aircraft, and construction.

Douglas Fir is a primary component of moist forests in the Western Hemlock ecological zone. Infrequent, widespread, stand-replacing fires, (usually caused by lightening strikes) naturally occur at perhaps 400- to 500-year intervals.

Douglas-fir (Pseudotsuga menziesii), also called red-fir, Oregon-pine, Douglas-spruce, and piño Oregon (Spanish), is one of the world's most important and valuable timber trees. It has been a major component of the forests of western North America since the mid-Pleistocene (30).

Douglas-fir is excellent as a specimen plant or used en masse for screening. Although not a true fir, it is a beautiful evergreen for the larger landscape. It has a conical shape, similar to that seen on spruces. A broadly conical to narrow, pyramidal evergreen tree which has open, tiered branches that are slightly pendulous.